OvershootIt might soon be far too hot on this planet. What do we do then? In the era of "overshoot", schemes abound for turning down the heatnot now, but a few decades down the road. Were being told that we can return to liveable temperatures by means of technologies for removing CO2 from the air or blocking incoming sunlight. If they even exist, such technologies are not safe: they come with immense uncertainties and risks. Worse, like magical promises of